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- W4313783089 abstract "Our previous study has shown that copper-containing amine oxidase ( CuAO ) and aminoaldehyde dehydrogenase ( AMADH ) could regulate the accumulation of γ-aminobutyric acid (GABA) in tea plants by participating in polyamine degradation pathway. However, the involvement of these genes in drought tolerance has not been underlined. In this study, CsCuAO1 associated with CsAMADH1 confers drought tolerance, which modulates GABA levels in tea plants, was conducted. The results showed that exogenous GABA spraying effectively alleviated the drought induced physical damage. Overexpression Arabidopsis lines of CsCuAO1 and CsAMADH1 exhibited enhanced resistance to drought, which promoted the synthesis of GABA and putrescine, by alerting reactive oxygen species scavenging capacity and stomatal movement. However, suppression of CsCuAO1 or CsAMADH1 in tea plants exhibited increased sensitivity during drought treatment. Moreover, the co-overexpressed plants increased the accumulation of GABA both in the Agrobacterium -mediated Nicotiana benthamiana transient assay and transgenic Arabidopsis plants. In addition, a GABA transporter, CsGAT1 , was identified, whose expression is strongly correlated with GABA accumulation levels in different tissues under drought stress. Taken together, CsCuAO1 and CsAMADH1 were involved in response to drought stress through a dynamic balance between GABA and putrescine. Our data will greatly contribute to the characterization of GABA biological functions in response to environmental stresses in plants." @default.
- W4313783089 created "2023-01-08" @default.
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- W4313783089 date "2023-01-08" @default.
- W4313783089 modified "2023-10-16" @default.
- W4313783089 title "CsCuAO1 associated with CsAMADH1 confers drought tolerance by modulating GABA levels in the tea plant" @default.
- W4313783089 doi "https://doi.org/10.22541/au.167320264.47785723/v1" @default.
- W4313783089 hasPublicationYear "2023" @default.
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